Belated Justice

Another conviction in the murder of a DEA agent

In central Mexico Ruben Zuno Arce is known as Don Ruben, wealthy cattleman, son of a governor, brother-in-law of a Mexican President and an influential provincial political boss. In the U.S. last week the dapper Zuno, 60, added another credential to his resume: convicted felon. A Los Angeles jury found him guilty of racketeering, kidnapping conspiracy, and aiding and abetting the 1985 kidnap-murder of U.S. Drug Enforcement Administration agent Enrique Camarena.

DEA agents burst into grins and clapped one another on the back. Zuno is the most prominent of the seven men tried so far in connection with the still unsolved...